JP2003095338A - Cushioning medium made of single-faced corrugated board and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cushioning medium which can be used as a spacer with stretchability and flexible bendability or as a packaging material by compressing a single-faced corrugated board to provide wrinkles on front and rear faces. SOLUTION: The cushioning medium 1 made of a single-faced corrugated board is formed with wrinkles 2 and 3 by compressing the single-faced corrugated board 4 in a direction orthogonal to its corrugations.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning material using single-faced corrugated board and a method for manufacturing this cushioning material.

[0002]

2. Description of the Related Art Conventionally, paper-made cushioning materials include wadding paper and embossed paper. The cushioning material using single-sided corrugated board is wound along the corrugated line as it is in a tubular shape, or a fixed size. It is used as a laminate by cutting and laminating it in a plane.

A cushioning material made of paper is disclosed in Japanese Patent Laid-Open No. 2000-17.
No. 7780 is disclosed, but in order to give thickness and elasticity to the paper surface, a paper piece bent in zigzag is put in a hollow drum and compressed from the zigzag end surface side to be rolled.

As a cushioning material made of synthetic resin, there is an air cap (trade name) having a large number of air bubbles on a sheet, which has flexibility and is excellent in shock absorption by the air bubbles.

[0005]

Among the conventional paper cushioning materials, the wadding paper and the embossed paper are easily crushed when a force is applied in the thickness direction, and the wadding paper and the embossed paper are protected only by the thickness of the paper. Absorbency is weak. Further, in the case of single-sided corrugated board, an air layer is present inside the corrugated step and is easily crushed, so that the shock absorption in the thickness direction is weak, and the corrugated board is formed into a tubular shape or used as a laminated body. Further, although it can be wound along a direction parallel to the corrugated step, it cannot be bent in a direction orthogonal to the corrugated step, and if it is forcibly bent, it has a problem of buckling.

The paper cushioning material disclosed in Japanese Unexamined Patent Publication No. 2000-177780 has a structure in which paper such as newspaper is once bent in a zigzag shape, put in a hollow drum and compressed from the end. . The raw material is a single flat paper sheet, and it is considered to have the same purpose in terms of imparting elasticity by compression and strengthening it, but using a single-sided corrugated board as a raw material, there is no technical idea to give it elasticity, Further, in the above-mentioned publication, a means is used which is charged into a hollow drum and compressed so as to be rolled from both ends of the folded paper. Therefore, the technical idea is different from that of the present invention, and there are differences in the material, manufacturing means, and form of the finished product, and also in the application.

Further, the air cap made of synthetic resin has a high manufacturing cost and may cause an environmental problem at the time of disposal.

The object of the present invention is to use a single-sided corrugated board, which is compressed to give elasticity and flexible flexibility to keep the sheet state in a lightweight state and to use a plurality of laminated sheets. Or, you can wrap a three-dimensional object using its flexible flexibility, and it has sufficient elasticity as a paper cushioning material, and it becomes an eco-friendly cushioning material even if it is incinerated at a low price, and it can be compressed. This is a cushioning material that can be manufactured by a simple means, and is intended to provide a cushioning material that can reuse paper resources as a corrugated board.

[0009]

According to a first aspect of the present invention, a single-faced cardboard cushioning material is formed by compressing a single-faced cardboard in a direction orthogonal to a corrugated step to form wrinkles and having elasticity.

In the second aspect of the invention, the wrinkles formed by compressing the single-faced corrugated board in the direction orthogonal to the corrugated steps form truss-like continuous wrinkles on the front surface and the liner on the back surface in the direction orthogonal to the continuous wrinkles. 1. A cushioning material made of single-faced corrugated board, characterized in that it is formed as a tie-wrinkled wrinkle and formed on a part or all of a corrugated board.

In a third aspect of the invention, a sheet of single-faced corrugated board is spirally wound into a cylindrical body with or without a core, and gradually compressed in a direction orthogonal to the corrugated steps using a press or the like. The method for producing the cushioning material was a single-faced corrugated board with wrinkles formed on the front and back surfaces.

(Operation) According to the first aspect of the present invention, by compressing in the direction orthogonal to the corrugated step of the single-sided corrugated board to form wrinkles, it is possible to have a very new stretchability and flexibility as a corrugated board. became.

On the front surface, a plurality of parallel continuous wrinkles are formed in a truss shape while maintaining the height of the step due to the shape of the tunnel, and on the back surface, there are tie-dense wrinkles orthogonal to the longitudinal step,
Moreover, the original flute (flute-the surface having corrugated step grooves) and the liner (liner-the flat surface of the single-sided corrugated board) are kept in a bonded state.

Therefore, the truss-shaped corrugated step and the tie-dyeing wrinkles on the back side work together to provide elasticity in the direction orthogonal to the truss direction of the waveform (the direction in which the tie-dyeing wrinkles expand and contract). It became so.

In the continuous wrinkles on the surface, continuous wrinkles are formed along the flutes of the single-faced corrugated board, and a plurality of parallel wrinkles are formed in accordance with the corrugated steps so that the height of the steps is maintained and the force in the thickness direction is maintained. Elasticity was strengthened to withstand. Therefore, it has a strong cushioning force as a thick cushioning material, can be folded and can be used as a spacer, and can also be freely folded and wrapped so as to enclose a solid material, and a stronger cushioning material can be obtained by stacking layers.

Although the cushioning material of the present invention is compressed, the joined state of the flute and the liner of the single-sided corrugated board is maintained, and it becomes a special sheet having stretchability in the length and width directions. Therefore, the condition of use as a cushioning material made of corrugated board changes,
The application can be expanded to wrap things.

In the second aspect of the invention, the wrinkles formed by compressing in the direction orthogonal to the corrugated steps of the single-sided corrugated board form a truss-like continuous wrinkle on the front surface flute, and the liner on the back surface draws a wrinkle orthogonal to the continuous wrinkle. It is dyed wrinkle, and the whole is flexible and stretchable and flexible, and it is possible to maintain the height as a flute and enhance elasticity.

In addition to being formed on the entire corrugated board, the corrugated board is compressed from the edges by the press of the press machine, so wrinkles can be provided only on a part of the corrugated board, and only cushioning materials having even wrinkles on the entire surface can be formed. Instead, it can be used as a special cushioning material in which some edges have wrinkles to make it stretchable and the rest remains the conventional single-sided corrugated board, and the application can be expanded.

In the third aspect of the invention, a single-faced corrugated sheet is wound into a cylindrical body with or without a core to form a tubular body, which is gradually compressed in a direction orthogonal to the corrugated steps by using a press or the like to form wrinkles. Was formed.

When the compression speed is abrupt, the cylindrical body is buckled or deformed, so that by gradually compressing, wrinkles can be formed uniformly from the end edge portion.

Since a sheet of single-sided corrugated board is rolled up in a spiral shape and compressed in the axial direction in a state in which the end edges are fixed to form a tubular body, the flute and liner which are adjacent to each other are maintained while maintaining the joined state. Form wrinkles while distributing the power to each other.

In order to make the single-sided corrugated board into a tubular body, it is sufficient to wind it along the corrugated line, and it can be wound with or without a core. The final end of the winding may be fixed so that it is not rewound with a tape or band and the compression by the compressor is not affected.

When the core is used during compression, buckling does not occur in the axial direction at all, and wrinkles are formed sequentially from below in the direction orthogonal to the corrugated step. Further, even when the core is not used, the height and the number of spiral windings may be controlled so as not to buckle.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a single-faced corrugated board is used to form a spirally wound tubular body, and is gradually compressed in a direction (axial direction) orthogonal to the corrugated steps, so that the flute has a truss-like continuous shape. Forming wrinkles, forming tie-wrinkled wrinkles on the liner in a direction orthogonal to the continuous wrinkles of the flute, and strengthening the flute while maintaining the parallel steps and the height of the corrugations by both of them The stretched wrinkles thus formed give rise to longitudinal and lateral stretchability, and a flexible sheet having flexibility is obtained.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments shown in the drawings will be described below. FIG. 1 is a plan view showing the surface of a cushioning material of the present invention, wherein 1 is a cushioning material, 2 is a truss-like continuous wrinkle, and the wrinkles are continuous along a corrugated step while maintaining the height of the flute of single-sided corrugated board. Is compression molded.

FIG. 2 is a plan view showing the back surface of the cushioning material 1.
Indicates fringed wrinkles. The fringed wrinkles 3 are wrinkled in a direction orthogonal to the truss-shaped continuous wrinkles 2.

An enlarged view of the truss-shaped continuous wrinkle 2 according to the present invention is shown in FIG. On the flute side, it bends and buckles in a minute plane while being approximated to a wavy shape, and is compressed, and the tombs that connect the minute planes form a three-dimensional truss and are continuous wrinkles. A line is drawn on some of the wrinkles to show that the wrinkles are compressed so that they are divided into small planes and folded. With such a structure, the structure has rigidity against a force in the thickness direction and absorbs an impact.

The cushioning material 1 has stretchability in the direction orthogonal to the flute due to the continuous wrinkles 2 on the front surface and tie-dyeing wrinkles on the back surface, and the elasticity of each corrugated step can withstand the force in the thickness direction. The impact resistance is enhanced as a thick cushioning material. In addition to being foldable and usable as a spacer, it can also be wrapped so as to enclose a solid material, and when laminated, it becomes a stronger cushioning material.

FIG. 4 is a perspective view showing a state in which a solid material (not shown) is wrapped with the continuous wrinkles 2 as an inner surface.

FIG. 5 is a partial perspective view showing a state after being taken out from the press machine after compression molding.

A method of manufacturing the cushioning material of the present invention by a trial pressing machine will be described below. The single-sided corrugated board is wound around a tubular body in advance without using a core.

FIG. 6 shows a front view of the press machine. Reference numeral 4 is a press, which comprises a lower compression plate 6 connected to a lower hydraulic cylinder 5, a mandrel 7 and an upper compression plate 9 provided with a through hole 8 for the mandrel 7 above, and 10 is a frame of the press. . FIG. 7 is a perspective view of the press machine.

8A to 8C are explanatory views showing the procedure of compression molding. (A) is a state in which the tubular body 11 in which a single-sided cardboard is wound is inserted into the press 4. (B) shows a state in which the mandrel is passed through the tubular body and set on the lower compression plate. In (c), the upper compression plate is set and the hydraulic cylinder is raised. In (d), the hydraulic cylinder is further raised and pressing is started. (E) is the press finished state. (He) is the state where the hydraulic cylinder descends to take out the product.

In order to wind the single-sided corrugated board into the cylindrical body 11, the winding is performed along the corrugated line and the final edge is stopped with tape or the like. You can stop the whole thing with a band, but if you loosen it, there is a risk of buckling, so make sure it is not loose.

The compression speed by the press is 300 to 500 m
m / min. Depending on the thickness of the corrugated board,
As an example, 10 m single-sided corrugated board with a diameter of about 300 m
m, the load is about 1t.

[0036]

According to the present invention, a single-faced corrugated board is used to perform compression processing in a direction orthogonal to the corrugated corrugations, so that elasticity is generated in the vertical and horizontal directions, and further flexibility is imparted to the paper-made corrugated board. In addition to being lightweight as a cushioning material and usable as a spacer, it has become possible to stack multiple sheets and wrap a three-dimensional object.

As with the corrugated board, a cushioning material that is thick and has sufficient elasticity, does not affect the environment even when it is incinerated, and is environmentally friendly and easy to use can be provided. Since it can be formed from single-faced cardboard, resources can be reused, and the manufacturing method of this cushioning material is simple.

[Brief description of drawings]

FIG. 1 is a plan view of the surface of the cushioning material of the present invention.

[Figure 2] Rear view of the same

FIG. 3 is an enlarged explanatory view of a truss-like continuous wrinkle.

FIG. 4 is a perspective view showing a state in which a solid material is wrapped in a cushioning material.

FIG. 5 is a partial perspective view of a tubular body compressed and formed.

FIG. 6 is a front view showing an example of a press machine.

FIG. 7 is a perspective view of the press machine.

FIG. 8 is an explanatory diagram showing a state where a tubular single-sided corrugated board is molded by a press machine.

[Explanation of symbols]

1: cushioning material 2: Continuous wrinkles 3: Tie-dyed wrinkles 4: Press machine

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Claims (3)

[Claims] 1. A cushioning material for single-sided corrugated board, characterized in that the single-sided corrugated board is compressed in a direction orthogonal to a corrugated step to form wrinkles and has elasticity. 2. A wrinkle formed by compressing a single-sided corrugated board in a direction orthogonal to a corrugated step forms a truss-like continuous wrinkle on a front surface flute, and a liner on a back surface tie-dyes in a direction orthogonal to the continuous wrinkle. The cushioning material for single-sided corrugated board according to claim 1, characterized in that it is formed into wrinkles and is formed on a part or all of the corrugated board. 3. A single-sided corrugated board sheet is wound into a tubular body with or without a core to form a tubular body, which is gradually compressed in a direction orthogonal to the corrugated step using a press or the like to form wrinkles on both the front and back surfaces. A method of manufacturing a cushioning material using single-sided corrugated board, characterized in that